https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78614
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 40206 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40206&action=edit gcc7-pr78614-3.patch The better patch actually doesn't seem to be much better, because simplify_replace_fn when it copies something (rather than successfully simplifies) doesn't clear the used bits and thus copy_rtx_if_shared afterwards will copy it again. But together with this simplify-rtx.c change it might work better. Will bootstrap/regtest that on x86_64-linux/i686-linux now.
